<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

    <form action="doLogin.do">
        <div class="row mb-n3">
            <div class="col-12 mb-3">
                <input id="username" type="text" name="username"
                       placeholder="用户名">
            </div>
            <div class="col-12 mb-3">
                <input id="pwd" type="password" name="password"
                       placeholder="密码">
            </div>
            <div class="col-12 mb-2">
                <input id="checkcode" type="text"
                       name="checkcode" placeholder="请输入验证码">
            </div>
            <div class="col-12 mb-1" align="center">

                <img src="checkCode.do" alt="" width="150"
                     height="48" class="passcode" style="height: 43px;
                                            cursor: pointer;"
                     onclick="this.src=this.src+'?'">
            </div>

            <div class="col-12 mb-3">
                <input class="btn btn-primary w-100"
                       type="submit" value="登录">
            </div>
        </div>
        <div class="row mt-4"></div>
    </form>
</body>
</html>